163998813366 has 24 divisors (see below), whose sum is σ = 355344533544. Its totient is φ = 54664152480.

The previous prime is 163998813359. The next prime is 163998813379. The reversal of 163998813366 is 663318899361.

163998813366 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×163998813366² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341946 + ... + 667026.

It is an arithmetic number, because the mean of its divisors is an integer number (14806022231).

Almost surely, 2^163998813366 is an apocalyptic number.

163998813366 is an abundant number, since it is smaller than the sum of its proper divisors (191345720178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163998813366 is a wasteful number, since it uses less digits than its factorization.

163998813366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353116 (or 353113 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The spelling of 163998813366 in words is "one hundred sixty-three billion, nine hundred ninety-eight million, eight hundred thirteen thousand, three hundred sixty-six".